US 11,938,214 B2
Benefit agent delivery system comprising microcells having an electrically eroding sealing layer
Lei Liu, Fremont, CA (US)
Assigned to E INK CORPORATION, Billerica, MA (US)
Filed by E INK CORPORATION, Billerica, CA (US)
Filed on Nov. 19, 2020, as Appl. No. 16/952,433.
Claims priority of provisional application 62/941,216, filed on Nov. 27, 2019.
Prior Publication US 2021/0154133 A1, May 27, 2021
Int. Cl. A61K 9/00 (2006.01); A61K 9/70 (2006.01); A61M 37/00 (2006.01)
CPC A61K 9/0009 (2013.01) [A61K 9/703 (2013.01); A61M 37/00 (2013.01); A61M 2037/0007 (2013.01); A61M 2205/0216 (2013.01); A61M 2205/0233 (2013.01); A61M 2205/0238 (2013.01); A61M 2207/10 (2013.01)] 16 Claims
OG exemplary drawing
 
1. A benefit agent delivery system comprising:
a conductive layer;
a microcell layer comprising a plurality of microcells, wherein each microcell includes an opening, and wherein a medium comprising a carrier and a benefit agent is contained in the plurality of microcells;
a sealing layer spanning the opening of each microcell and comprising a polymeric material and a metallic material;
an electrode layer, and
a voltage source that is coupled to the conductive layer and the electrode layer;
wherein the conductive layer, the microcell layer, the sealing layer and the electrode layer are vertically stacked upon each other;
wherein the microcell layer and the sealing layer are disposed between the conductive layer and the electrode layer, and
wherein, when a voltage is applied from the voltage source between the conductive layer and the electrode layer, the metallic material is oxidized and removed from the sealing layer, creating a porous sealing layer.